Pneumatic sheet-controlling mechanism.



Jgw. DIoKINs/ON. PNEUMATIC SHEET GONTROLLING- MECHANISM.

' APPLICATION FILED l.".|B.28, 1912. 1,098,89@ Patented June 2,1914,

@515 @Horne o @M31 www "UNITED sTATEs PATENT ornros.

JOSEPH VI. DICKINSON, 0F CRANFOR-D, NEW JERSEY, SSIGNOR TO THE SCHUBERT PIANO COMPANY, OF NEW YO'R-K, N. Y., A CORPORATION 0F NEW YORK.

PNEUMATIC SHEET-CONTROLLING MECHANISM.

Specification of Letters Patent.

Patented une 2, 1914.

Application :tiled February 28, 1912. Serial No. 680,399.

This invention relates to pneumaticmehanism for automatic player instruments,

4 such as automatic pianos, and more particularly relates to improved pneumatic mechanism for controlling the movement of sheets or webs, such for instance as perforated music sheets, the object of the invention being to provide an improved mechanism ofV this character simple in its construction and positive in its operation and effective in use, and by means of which the music sheet will be automatically maintained in .-its proper position relatively to the tracker board so that the perforations will coincide or track with the corresponding apertures of the tracker board or bar at all times during lthe playing of the musical instrument, and

which mechanism may also be readily ad- ]usted to correspond with diiferent widths yof music sheets, the present organization being in part-an improvement upon that shown and described in my prior applica tion Serial No. 622,812, led April 22, 1911;

One of the objects of the present-improve- .ment is to provide a pneumatic sheet-com trolling means in which, on the cessation of the pumping operation the music sheet will not be moved to one side or the other by the l further action of the pneumatics, `but will remain in the position in which it was when the traveling movement of the sheetceased.

Another object of the present improvement is the provisionof an improved pneumatically controlled sheet-guiding meclia` nism so constructed that the necessity of providing two ports, one at each end of the tracker bar, or two valve-controlled.ports,

one at each side of the music sheet, 1s avoided, the present mechanism being so organized and constructed that one port will do the work of two, so that should that edge of the sheet' opposite to the port be muti= lated the operation o f-.the mechanism` 'will not lbe interfered with. In other Words, where ports are provided tat eachend of the tracker bar for engagementby the traveling web, or Where valve-controlled levers are located at each side of the sheet for engage`v ment thereof by the edge of-the sheet, it'

follows that if one edge of the sheet is torn Vtions therein might be in perfectv register with the tracker bar perforations, and the sheet so be thrown out of register, but by the present mechanism it is not necessary that both edges of the 'sheet shall be in per`-` feet condition. In the drawings accompanying and formlng part of this specification, Figure 1 is a perspective view of this improved mechanism as the same may be applied to a pianoforte; Fig. 2 is a sectional view of the valve box or chamber; Fig. 3 is a'sectional .View of the two pneumatics; Fig. 4 is a detail view of the sliding bearing member; Fig. 5 is a, sectional view of the spring-controlled bearing m'emberg-Fig. Gis a'detail View of the movable valve; and Fig."7 is a detail View illustrating the connection between the sliding bea-ring member and the cam. Y .v

Similar characters of reference indicate corresponding parts throughout the' figures of the drawing The present improvement is particularly adapted for self-playing instruments, and in the present embodiment thereof is shown constructed for such purpose. The music rolls are preferably carried by a suitable casing or support 2 of any' desired construction. The music roll 3 carrying the record o r sheet which is to travel over the perforated tracker board 5 is located between a pair of bearing members G and 7 carried 'sliding rod having a clutch lconnection with the opposite end of thel shaft of the music roll 3. The spring-pressed plunger 8 actsv to maintain the music roll shaft in engagement with the sliding Irodand this is the main purpose of such spring-actuatedl plunger` rlfhe take-up roll 11 is suitably supported at 'the opposite side of the tracker board, and these two rolls are operated by suitable. driving mechanism, which, as it' does not differ from mechanisms well known for this purpose, further description there` Q A ber, 19,v 1s\1n communication with the chamof is deemed unnecessary.

Carried by the casing 2 is a movable valve;l

5controlled port comprising apivotally securedlever having at its innerend `a port 12 and at its forward end a thumb-piece or handle 13 by means of which this port may beshifted. Closing this port is a' Valve 14C, 10 which is likewise carried by a pivoted lever 14 the forward end 14e of which is in position to be engaged by the edge of the music sheetand projects outside ofthe casing. These two' levers are maintained in l5 proper coperative relation by means of a' spring 16.- By shifting the port,and With which the l valve moves, various Widths of sheets may be used in the appara- `tus or transposition of the key ofthe miisic readily accomplished. To this port 1 2 a tube 15 is connected which leads to a pneu! matic A, it being connected to one end of a T-shaped coupling 17 which opens into a pneumaticAQ'the opposite end of the T being connected -by a exible tube 18 withv a chamber 19 of a valve'boxor chamber 20.

The pneumatic A is made up 'of' the pneu-4 matic A" hereinbefore described and the pneumatic A, one at each side of apartition or rigid portion 21, which' is; secured vat its lower end to any suitable support, preferably adjacent tothe 'tracker'board casing. In. the Vpresent instance this partition 1s braced by Yafsuitable brace 22 from such casing. The two pneumatics A and A are connected together byfav bracket 23 sb'- rthat they will move in unison; other words, one will contract while the other is expanding# 4o The valve chamber. or box 20 has anl opening 2{1 a`t one part, as atits top, which mayv be covered with a suitable porous material 25 'to permit' the passagcof. atmospheric air into the box.v lVithin the box is provided a pair 4ot' ports `2G and27 formed in' any suitable manner, and -For closing these ports a valve 28 is provided adapted to move from one to the other `andx'zarried by a` rod 29 suitably guided by cross members 30. A T he lower end of thisrod is provided with a head or button31 adj ustably secured thereto in position adjacent to a diaphragm 32 1ocated above and' formi-ng the top of the chamberf19. From the 'foregoing'iit 'will be observed that. by this construction three Y chambers are i"ovi'ded in the valve box, one,-

' 69A', In this instance, however, the commu- `mospheric air is cut off to the chamberlfl nication with the pneumatic A" is by means of a. small bleeder hole 35. The third chamber 19 when the valve 28 is raised, but cutolf therefrom `when thevalve is dovn and seated, and this chamber 19 is in eommunication withv the pneumatic A by means' of a tube .36. It will be observed that when the valve 28 cuts o communication between the chambers 19 and 19"' the chamber 19- is open to the admission of atmospheric air. through the opening or port 24;, `so that such air will pass through the tube 3G into the'pneumatic A, but that'whe'n the valve 28 is raised the admission of such at' so and therefore cut oft' from -the tube 36 and Y the pneumatic A, and such chamber 1.9 is thus thrown into communication'withy the chamber 19 so that the suction ofthe main bellows will be exerted in the' pneumatic A through, the tube 36, chamber 19' and.v chamber 19 through tube 33 lcadin'gto such main pumping bellows.

Secured to thel pneumatic A is an arm or ,90 projection "38. Suitablyf supported' at one end of the casing 2 is a cam 40,:vvhich` c an is sovconstructed that itwill always engage theend of theV sliding bearing vmember or rod v7, in engagement with which -thejspring-- pressed plunger 8 hereinbefore described `acvts to maintain the music rollshatB. f The rock. shaft is Yp1"ovi ded with' a crank arm 41,- and thisfcrank arm, is connected- With- `the projection 38 by 4means of anjadjustable 1Q@ member shown as comprisinor a paireof rods 42l and 43,`the inner' ends otfwhich-overlap and which are lfastenedl tr'igetherA by means'4v of some suitable adjusting device M,.where,

by the rods vmay be adjusted lengthwise asv 105,

occasion may require. ,In operation, when thegmovable or. adjustable port 12 is' closed and thesheet travveling overl theltracker bar, the main pumpc ing Abellows exertsits suction through the tub'e 33 in the chamber 19 of the valve'box 'and simultaneously, through the tube 34,'tothe pneumatic Af through the bleedejr Vhole .85, 'at which time, by reasonofthe fact that the valve -28 is seatedpand closes the port 27, 115 the pneumatic A. is open to at-mos heric air through the tube 36,1portf26 an port 24, andconsequentl .the pneumatic Avgmay gradually close w ile the pneumatic 'A'= will gradually open. f Thisv movement of the 12o pneumatics will oscillate ther-'ook'.shaft and thereby rock the cam so as to'shift the. vslid- 4ing rod 7 and therebythe music" roll and its music sheet to the left','jwhich shifting movement of the sheet will' cause the edge there- 12a of to engage with the'part lfo the valve lever 14 to shift such valve lever and move the valve 14 `thereof away romtheport 12 slightly, thereby admitting atmospheric airl through theft'ube 15 to the pneumatic Af 133 :through the port' of theT-shaped coupling 17 thereof, -which port is larger than the bl'eeder hole 35 and consequently overbal,

ances the suction being exerted on the pneumatic A. At the same time' the atmosric air passing into the movableJ port 12 through thetube l5 to the pneumatic fr will also pass through the tube 1S in coimuuuication with the chamber 19 of the valve box below the diaphragm 3Q, causing the same to rise into engagement with the hea'd 31 of the` valve`rod 29, thereby lifting the valve 2S so as to close the port 26 between the port- 24; and the tube 36 and opening the port 27 between such tube 36 and the lower chamber 19', thus permitting the suction from the Vmain pumping bellows to operate through such tube 3G onhe pneumatic A, thereby contracting the same while the pneumatic A is opening, which action of the pneumatics moves the rocker cam in the opposite direction to that hereinbefore described, which causes the music roll to move to the right so that the edge of the sheet will permit the valve 14 to close the port 12, at which time the sheet will have been properly trued so that the perfor-ations thereof will register with the perforations in the tracker bar. v From the .foregoing it will be observed that the sheet is thus positively maintained in its proper registering position on the tracker bar at all times by being shifted either to the right or to the left as occasion may require, and this by means of a single `port at one side of the sheet edge.

In the present improvement it` is prefel-red to have a positive connection between the rocking cam and the shaft of the music roll, so that the necessity of providing means for normally pushing the music roll sheet in one direction is avoided, and so that the spring-actuated plunger may be only under suh'icient pressure to'properly maintain the music roll in position between itsv bearings in the usual way so that the .music roll may be readily removed and replaced, and therefore 1n the present improvement I have shown the end of the bearing rod 7 provided with a T-shaped end located in a similarly formed slot 4G of the cam, where- V by` as the cam moves in one direction or the other the bearing rod Z will be shifted accordingly and therefore will positively' shift the music roll lengthwise in one direction or the other. Various means for connecting .the rocking cam withv the'shaft of Vthe music roll may be provided, but that herein shown will be sufficient for the purpose.

1When the sheet is properly trued the valve 14, as hereinbeforc stated, closes the port 12. cuttinff ofi' the )asf-rige of atmos heric l air to the pneumatic A and to the chamber 1S) through the tube 18, whereupon the valve 28 seats itseli'. to close the port 27 and openv the port 26, when the operation first described againtakes place.

From the foregoing-it will also be observed that by the provision of a pair of pneumatics operating in the manner described theA action of one counterbalances that of the other, so that they will be maintained in'equilibrium to. properly maintain the sheet in its correct position relatively to the tracker bar, and that, furthermore, when the pumping of the apparatus is stopped the music sheet will remain in its proper' posi# tion without being moved in one direction, as to the right, as is frequently the case in mechanisms of this kind. Furthermore, it will be observed that both pneumatics are governed by asingle port, so that the necessity of duplicating such ports, whatever be their construction or location, is obviated.

l/Vhile it is preferred to have a lpositive connection between the rocker cam and the sliding bearing rod. 7, which, as hereinbefore stated, may bc of various forms, this positive connection could be dispensed with--so long as some provision was made for keeping the rocker cam in engagement v with the sha-ft or the shaft in engagement with the rocker cam, as by means of a spring, and for this purpose the spring plunger Vcould be used. It is therefore apparent that including a plurality of pneumatics having connection with suction-creating means, and a single port controlled by ithe traveling sheet for controlling the entire operation of said pneumatics. 2 v

2. An` apparatus of the character described having a perforated tracker-bar for the passage thereoverof a perforated sheet, means for preserving the registration of the sheet -perforations withthosel of the tracker and ,including a pluralityof pneumatics connected together for simultaneous movementv` in the same direction and having connection with suction-creating means, anda single port controlled bythe traveling sheetor web for controlling the operationof saidpneumatics in opposite directions.

3, An apparatus of the character described having a perforated tracker bar forthe passage thereover of a perforated sheet, means for preserving the regis ration of the sheet ,perforations with .those f the tracker and including a plurality ofpneumatics 'having connection with suctionscreating means, and a single adjustable port controlled by the traveling sheet or web for controlling-Whe operation of said pneumatics in diiferent ldirections. e Y

e, A11-apparatus or' the character described havingga perforated tracker bar for the passage thereover oa perforated sheet, means for preserving/the registration of' the sheet perforations with those of the tracker and including a plurality et pneumatics having connection with a suction-creating means, and. a single .portlocatedavvay from the sheet or web to be ggfuided and controlled by means in engagement With such sheet for controllingthe entireoperation of said pneumatics.

5. An apparatus of the character vdescribed havin -taperforated tracker bar for the passage t ereover of aperforated sheet, means for preserving the registration of the sheet perforations with those ofthe tracker and.

including av plurality of pneumatics having connection'with suction-creating means,l and a lsingle adjustable port located awayrom f the sheet or wehrte be guided and controlled by means in ,enga'gement,Withsuch sheet for vcontrolling' theeperation of said pneumatics.

b. An apparatus of the character described having a perforated tracker bar for thepassage thereover of av perforatedsheet, means for preserving the registration of the sheet perforations with those'of 4the trackerl and including a plurality ofpncumaticsfhaving connection with suctiorycreating means, and a pivot-ally supported lever carrying a port and controlled by mea'nsin engagement with for engagement `with the sheet or .web for` controlling the operation of said pneuf matics. Y l Y. s, y r

8.' An apparatus" of the chzjzracter described having a perforated tracker bar for the,l passage thereover of a perforatedsheet, means forpreserving the registration of the sheet perorations Witlrthose'of the tracker and Aincluding l a pluralityfof- -fpneum atics having .connection witl. 'a suctioncreating means, af

pivotally supported lever carrying a pos'tn V communication- Witli Said pncumatics anello cated from the sheet or wel) to Guided, and apivo'ally supported lever having a valve controlling said port and in posi-l Ation to be engaged by the sheet or web' for i controlling the operation of said pneumatcs.

controlling the operation of both of said pneumatics.

10. A music sheety guiding mechanism comprising means operative to move the sheet laterally to preserve the proper position thereof and means including a pair o pneumatics movable in unison for control- `ling the operationof said means and comprising a lever carrying;- a port opening tothe atmosphere, and a lever carrying a valve for controlling said port and having a part thereof imposition to be engaged by the sheet. Y

ll. An apparatus of the character described having a perforated trackerl har for thev passage tliereover of a perforated sheet, means. for preserving the registration o sheet perforations with those of the tracker and including a plurality oi g'neumaAU having connection with suctioncreat-inge; means, asingle movable port' and a. valve lever in 'engagement with the' sheet er web to begui'ded for controlling said port and thereby by one and the same port. 'the eperation of said pneumatics at all times.,

12. An zqyparatus of the character described having a perforated tracker' bar for the passage thereover of a orated sheet, means for preserving the registration ofthe sheet perforations with thos of the tracker and-including a port in pos 'ion to be controlled by a tra vcling web or sheet, a pair of pneumatics in communication with said port, a vvalve box carried independcntlf,7 of andupart from said pneumatic-s in communication with each olf said pnenmatics, a valve in 'said box, and means connecting said box with suction creating means.

i3. An apparatus ot the character (le,-

.scribed having a perforated tracker bar for i the passage thercover of a'pr-zrt'orated sheet,

means Afor preserving the registration of the sheet perfor-ations with those of the tracker yand including a porta valve closing said port and adapted to he operated by a travcling sheet or web, a pair of pnelnnltics in communication with said port, a valve hox lcarried independently of and apart 'from Asaid pneumatics in communication with cach iofsald pneumatics, a valve in said box, and

means connecting said boxavith suctioncreating means.

14:. An @apparatus ef the character described having a perforated tracker har for the passage thereover oit"A a perforated sheet, means for preserving the registration of the sheet perforations with those of the tracker and including a pivot-ally supported lever carrying a port, a pvotally supported lever carrying a valve for closing said port and adaptedto be operated by a traveling sheet "or web, a pair of pneumatics connected forl simultaneous movement in the same direction in communication with said port, a valve rbox in communication with each of saidpneumatics, a valve in said box, and means connecting said box with suction-creating means.

15. An apparatus vof the character described having a perforated tracker bar for the passage thereover of a perforated sheet, means for preserving the registration of ,the sheet perforations' with those of theA tracker and including means for shiftably supporting one of said perforated parts, a single cam in positive engagement With a part of said supporting means for shifting it in opposite directions pneumatica'lly operated means for operating said cam, and means for controlling the operation of said 'pneumatically operated means.

16. An apparatus of the character described having a perforated tracker bar for the passage thereover of 'a perforated sheet, means for preserving the-registration of the sheet pcrforations withl those of the tracker and including means for shiftably supporting a sheet roll, a cam in engagement With a part of said supporting means, pneumatically operated means for operating said cam, and means for controlling .the operationof said pneumatically operated means and comprising a shiftable member in engagement with the sheet, and a single-port controlled by said member for governing the movement of the sheet'supportingmeans in opposite directions. i

17. An apparatus of the characterl described having a perforated tracker bar for the passage thereover of av perforated sheet,

means for preserving the registration of the sheet perforations with those of the tracker and including means for shiftably supporting a sheet roll, a cam in engagement with a part of said supporting means, pneumatically operated means for operating said cam, and means for controlling the entire operation of said pneumatically operated'mcans and comprising a shii'tablc member in engagement with the sheet and a single adjustable port controlled by said shiftable member.

18. An apparatus of the character described having a perforated tracker bar for the passage thereovcr of a perforated sheet, means for preserving the registration of the sheet perforations with those of the tracker and including means for sh'iftably supporting a sheet roll, a single cam having a positive connection with a part of said supporting means for shifting it in `opposite directions, pneumatically operated means for operating said cam, and means for controlling the operation of said pneumatieally operated means.

19. An apparatus of the character described havning a perforated tracker bar for the passage thereover of a perforated sheet,

means for preserving the registration of the sheet perforations with those of the tracker' and including means for shiftably supporting av sheet roll, a cam in engagement with a. part of said supporting means, and a singie-port controlled pneumatically operated means for shifting said cam alternately in different directions.

20. An apparatus of the character described havinga perforated tracker bar for thepassage thereover of a perforated sheet, means for preserving the registration of the sheet perforations with those of the tracker and including means for shiftably supporting a sheet roll, a cam in engagement with a part of said supporting means, pneumatieally operated means for operating said cam,

`a`single port located away from the sheet and in communication with said pneumatically operated means for controlling -the entire operation thereof, and shiftable means for controlling said' port and in :position to be operated 'by the sheet.

2l. An apparatus of the character described having a perforated tracker bar for the passage thereover of a perforated sheet, means for preserving the registration of the sheet perfor-ations with those` of the tracker and including means for shiftably supporting a/sheet roll, a cam in engagement with a part of said supporting means, a plurality of pneurnatics connected with said cam, and a single port controlled by a traveling sheet for controlling the entire operation of said pneumatics. v

22. An apparatusof the character' dcscribed having a perforated tracker bar for the passage thereover of a pertorateil sheet, means for preserving the registration of the sheet perforations with those of the tracker and including a sliding shaft for supporting a sheet roll, a single cam having a positive connection with said shaft, pncuuiatic means for operating said cam to shift the shaft in 'opposite directions, and m'eans for controllinglthe operation of said pneumaticl means.

Q3. An apparatus of the character described having a perforated tracker bar for the passage thelcover of a perforated sheet, means for preserving the registration of the sheet pcrforations with those of the tracker and incliuling means for shi'litably support- .ing a sheet roll, a cam in cngz-igcment with a part of said'supporting means, a pair of pneumatics in connection with said cam for operating it in opposite directions, an adjustable lever projecting through the tracker bar and carrying a port in communication with one of said pneumatis, and a shiftable lever adapted to be engaged by the. sheet and having a valve for closing said port.

2li. An apparatus of the characte" described having a perfor-ated tracker bar for the passage thereover of a perforated sheet, inea-ns for preserving'the registration of the sheet persiorations with those ot the tracker and including means for shiftably supporting asheet roll., a cam 'in engagement with a part of said supporting means, a pair of pneumatics in connection with said cam for operating it in opposite directions, an adjustable lever carrying a port in communicatiouwith one of said pneumatics, a shiftable lever adapted to be engaged by the shcetand having a valve for controlling said port, said levers projecting through the tracker bar and ay valve box carrying a valve in communication with said pneumatico and having com munication with suction-creating means.

. 25. [an apparatus of the character described having a perforated tracker oar for the passage thereover of a perforated sheet,

' means vtor preserving the registration of the sheet perforations with those of the tracker` and including means for shiiftably supporting a vsheet roll, a cam in engagement `with a part o said supporting means, a pair of pneumatics in connection with said cam for `operating it in opposite directions, an adjustable lever carrying a port in communication with one oit said pneumatlcs, a shift- I Aable lever adapted to beengaged by the sheet and having a valve for controlling said port, a valve box carrying avalve, said valve box having a -chamber in communication with Said iort and with one oi said. pncuinatics, a diap xragm for said chamber and also having another chamber in communication with suction-creating means and with the same pneumatic and another chamber in communication with the other pneumatic and with an opening to the atmosphere, said valve being operative by the diaphragm to cut od communication at a predetermined time between said last two chambers and at another time communication from one of said chainbers to the. atmosphere. l

26. An apparatus ot the character described having a perforated tracker bar for the passage thereover of a perforated sheet, means for preserving the registration of the sheet perorations with those of the tracker and including means' for shittably supporting a sheet roll, a single cam in engagement with a part of said supportin means, )ncumatically operated means acjustably connected with said cam, and menus for controlling the operation ot said pneumatically operated means.

27. An apparatus of .the character dcscribed having a perforated tracker bar for the passage therelover of a perforated sheet,

incasso means for preserving the registration of the sheet perforations with those of the tracker and including means for shiiitably support- .ing a sheet roll, a cam vin engagement with a part o said supporting means, pneumati- 'cally operated means tor operating said cam, and shiftable means projecting through the tracker bar and in engagement with the sheet and controlled thereby for controlling the operation of' said pneumatically operated '75 means,

. 28. An apparatus of the character described having a perforated tracker bar for the passage thereoverpf a perforated sheet, means for preserving the registration of the sheet perforationsy with those of the tracker and including means 'for shiftably supporting a sheet. roll, arcani in engagement with a part of said supporting means, pneumatilcally operated means for operating said cam and comprising a pair of pneumaties mov- 'able simultaneously in the same directiomj' and shiftable means adapted to be operated by the sheet for controlling the entire operation of said pneumatics and including a single port.

29. An apparatus of the character described having" a perforated tracker bar for the passage-thereover of a perforated sheet, means for preserving the registration of thev sheet perforations with those of the tracker and including means for shiftably supporting a sheet roll, a cam in engagement with a part of said supporting means, pneumatically operated means for operating said cam and comprising a pair of pneumaticsI mov` able simultaneously in the same direction, shiftable means adapted to be operated by the sheet for controlling the operation of said pneumatics, a valve box carried indeypendently of and apart` from said pneumaticshaving a plurality of chambers in communication with sa1dpncum'at1cs and 'with suction-creating means, -and a valve in said 'ocx for simultaneously cutting oi 110 communication between one of said chambers adnd the pncurnatics and for opening another of said chambers to the atmosphere.

30. An apparatus of the character described having a perforated tracker bar for the passage thereover of a perforated sheet, means for preserving the registration of the sheet perfqrations with those of the tracker and including means for shiftably supporting a sheet roll, a cam in engagement with 120 a part of said supporting means, pneumatically operated means for operatingr said cam, and a single port controlled by the entire traveling sheet for controllingr the entire operation of said pncuiu'atically operated 125 means.

81. An apparatus of the character described, having a perforated tracker bar for the passage thercover of a perforated sheet,

sheet perforations with those' of the trackerA 'ment in the same direction and having connection with suction .creating means, a swinging member, a port carried thereby,

t -a swinging member, and a vvalve carried thereby for controlling said port, said'valve being controlled by the traveling Sheet or Web and the said ort contnollingthe operation of all of sai'pneumatics at all times.

A music sheet guiding mechanism comprising a perforated tracker bar for the passage of a perforated music sheet thereover, means operative-to move said tracker bar and sheet one relativelyv to the other and including a plurality .of pneumaticsmovable in unison and a single port controlled by the sheet for controllingA the operation of all vof said pneumatics in'all of their movements. v

83. A music sheet guiding mechanism comprising a perforated tracker bar for the passage of a perforated music sheet thereover, means operative to move said tracker bar and sheet one relatively to the vother and including a plurality of pneumatics movable in unison, a single port for controlling the operation of all of said pneumatics in all of their movements, means for adjustably carrying said port, a valve for controlling it, and means shiftably carrying said valve and in engagement with the sheet. y

34. A music sheet guiding mechanism comprising a'perforated tracker barfor the passage of'a perforated' music sheet thereover, means including a plurality of'pneumatics movable in unison -for shifting the sheet and the tracker bar one relatively to the other, and means for controlling'the operation of said means to preserve the proper position rthereof and comprising a -lever carrying a port, a lever carrying a valve for closing said port and having a part thereof in position to and the same port controlling all of said pneumatics. A v c 35." An apparatus of the character described, having a perforated tracker bar for the Apassage thereovcr of a perforated sheet, means for preserving the registration of the sheet perfor-ations with Athose of the tracker and including means for shiftably supporting'the sheet and the tracker bar one relatively to the other, a cam in'engageinent with a part of said supporting means, and a single-port controlled pneumatically' operated means for shifting said cam in different directions and thereby the said supporting means.

An apparatus of the character4 described, 'having a perforated-'tracker bar for the passage tliereover of a perforated sheet,

ferent directions and' thereby ,be engaged by the sheet, onev means for preserving the registration of the sheet perforations with those of the tracker and including means for shiftably supporting the sheet andthe tracker bar one'relatively to the other, a cam in engagement with the part of said supporting means, and and a single-port controlled pneumatically operated means for shifting said cam in difthe' said supporting-means' and comprising a plurality of pneumatics movable in unison.

37. A music sheet Vguiding mechanism.,- comprising a perforated tra'cker bar, sheet lWinding means carrying a perforated music sheet,vmeans.for shifting one'of the partsl relatively to the other thereby to insure the registration of the sheet 'perforations with. those of the tracker bar and including a plu-v rality of pneumatics movablel in-unison,V

means for controlling Asaid pneumatics and comprising a. single swinging port and a swinging valve forvcontrolling said port and in engagement with the sheetv and movable thereby and\a valve box having flexibleconduit connection with l the pneumatics vand With said port-, .1

38. A music sheet guiding mechanism vcomprising a perforated tracker bar, sheet winding means carrying a perforated music sheet, means for shifting oneofthe parts relativelyv to-the other thereby to .insure Ithe `registration of the sheet perforations with those of the tracker bar and including a plural-ity of pneumatics movable in unison,

means for controlling said pneumaticsand comprising a single swinging portand a swinging valvefoi controlling said port and in engagement with the edge of the sheet' and a valvebox having iieXible conduit coin'-v nection with the pneumatics and with said ort. p 39. An apparatus of the. character dcscribed, having a perforated tracker bar for the passage. thereover of a .perforated music sheet, means for preserving the registration ofthe sheet perforations with those of the `and movable Vthereby for maintaining the pneumatics in their balanced position when the web is -in its normal tracking position,

tracker and comprising means operative to p, shift one of the perforated members relatively to theother and consisting of a singleport controlled, pneumatically operated means consisting ofV a plurality 'of pneumatics operative in unison and avalve box having a flexible conduit connection with said vpneiii'natics and port. Y p Signed at New York city, N.' Y-this 27th f day of February, 1912.

i JOS. W. DICKINSON. Vitnesses Ronnnr "Sinrsr, v ARTHUR KATZ, 

